Consolidated Statements of Shareholders' Equity (Parenthetical) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Proceeds from exercise of shares under option plans (in shares)	20	16
Repurchase of shares (in shares)	690us-gaap_TreasuryStockSharesAcquired	6us-gaap_TreasuryStockSharesAcquired

Number of share options (or share units) exercised during the current period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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Name:	us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration